Apparatus for treating and delivering pulp.



W. F. TRAUDT.

APPARATUS FOR TREATING AND DELIVERING PULP. APPLICATION FILED FEB. 12,1913 1,089, 1 65, Patented Mar. 3, 1914.

2 SHEETS-SHEET 1.

W. F. TRAUDT. APPARATUS FOR TREATING AND DELIVERING PULP.

APPLICATION FILED TEB.12,1913.

Patented Mar. 3, 1914.

2 SHEETS-SHEET 2.

5] W00, ntoz wt UNITED 1 STATES PATENT OFFICE.

WILLIAM F. 'ZHRAUDT, OF RUTHERFORD, NEW JERSEY, ASSIGNOR TO TABER PUMP COMPANY, A. CORPORATION OF NEW YORK.

Specification of lLetters Patent.

Application filed February 12, 1913. Serial No. 748,052.

To all whom it may concern Be it known that I, WILLIAM F. TRAUDI, a citizen of the United States of America, residing at Rutherford, county of Bergen, State of New Jersey, have invented certain new and useful Improvements in Apparatus for Treating and Delivering 'Pulp, 0 which the following is a specification.

My invention relates to the washing of pulp and comprises apparatus by which such may be thoroughly and economically pulp1 was ed and also, without further handling,

delivered at any desired treatment.

My invention particularly relates to the washing of pulp such as occurs in brewing processes, or of wood or other pulp which has a specific gravity not much greater than that of water. Such pulp is now washed in point for further tanks by a itating apparatus and then drawn 03 into fi ter baskets in which it is transported by hand to the filter presses.

T have invented a form of apparatus by Figure 1 1s a general view in sideeleva-' tion' of an entire apparatus. Fig. 2 is a longitudinal central vertical section of a tank and it attachments. Fig. 3 is a plan view of the same with part of the tank cover re- I moved. Fig. 4 is an axial section of the preferred form of pump, and Fig. 5 is a cross section of the pump.

Throughout the drawings like reference characters indicate like parts. y

1 is a tank for containing the quantity of pulp to be treated usually having overflow troughs 2, 2, at either side near the top, which are connected with the tank interior by strainers (not shown).

3,. are overflow pipes connected to.

7 troughs 2, 2. Preferably the tank hashinged covers, two of which are shown-in Fig. 3 at 4, 4. As shown, the tank 1 rests on cradles 5, 5. At one end near the bottom is the outlet extension '6 which preferably tapers as shown and connects at its smaller outer portion with the inlet 12 of rotary pump 7. Preferably the pain is of the centrifugal type, two radial bla es 11, 11, being shown in the drawings, mounted on shaft 8. To prevent the pulp caking in the tank extension 6 and clogging the pump inlet, I extend shaft 8 into the tank interior, or extension thereof, and provide it with any suitable igitating or cutting devices such as helical Figs. 2 and 4. Any suitable motor for drivin the pump is shown at 10.

mm the pump outlet 13 a conduit 14 extends to an opening in the bottom of the tank near the other end, away from the pump, where it terminates in any suitable nozzle. Preferably I use a nozzle 16 (see Figs. 2 and 3)which has a fiat, flaring mouth shaped to deliver a fanlike stream of liquid at a high velocity parallel to the tank bottom and away from the pump.

15, is a valve controlling the connection from conduit 14 to nozzle 16. The end of tank 1, against which the stream from nozzle 16 is directed is preferably joined to the tank bottom-by a sweeping curve 17, tangential to the line of discharge from the nozzle. The same tank end is preferably pro-' vided with an inwardly curved deflecting plate 18, intermediate of its height. A branch conduit 19 to which access is controlled by valve 20, extends from the main conduit 14, to filter press 21, preferably terminating in a hose or other movable end section 25, controlled by valve 26. Feed water pipes 22, and 23, for hot and cold water supply, connect to the tank 1 at any convenient point, preferably at the outlet extension 6 where the pulp masses are apt to be densest. Valves 24, 24, control the water supply.

In operation tank 1 is filled with water and any proper chemicals up to the overflow level and the proper quantity of pulp dumped in. The pump is then started, valve 15 being open and valve 20 closed. The pump sucks in pulp and water through inlet 12, beats the pulp with its rapidly revolving blades, and expels the pulp and water into conduit 14. From this the mixture is de livered through nozzle 16 in a flat, fan like jet, under considerable pressure and velocity along the tank bottom and up the curved end 17 and against deflecting plate 18, by

Patented Mar. 3, 1914. l

ades forming a pointed screw 9, shown in i which it is thrown out into the body of the tank with a rolling, tumbling motion which most effectively agitates and mixes it with 'the fluid in the tank. Any tendency of the pulp to jam or cake in the'tapering tank extension 6, 01' pump inlet.12, is counteracted by the agitatin action of screw 9 and the diluting etfect or the feed water delivered at that point. The surplus fluid passes oif through troughs, 2, 2, and pipes 3, 3.

When the pulp washing is completed valve 20 is opened and valve 15 shut, as are also valves 24-. Continued action ofthe pump then draws oif all the contents of tank 1 and delivers them in a few minutes to one or more filter presses 21, or other receptacles.

The advantages of my invention comprise the effective agitation and washing of the pulp in the course of its'repeated circulation through tank and pump,the beater-like action of the blades of the centrifugal pump being most effective for this purpose during its passage through the pump, and the nozzle and deflector plates producing a swirling action in the tank of like effect; the prevention of clogging in the pump inlet; and

ease of transfer of the pulp to other receptacles, all by the operation of one pump.

Various changes could be made in the details of the apparatus illustrated without seriously aficcting its mode of operation or result so long as the principles of the inventions as above described bepreserved.

Having, therefore, described my invention, I claim:

1. The combination of a tank, a centrifugal pump having its inlet connected to one end of the tank, a conduit extending from the pump outlet to the other end of the tank, a filter press, a branchconduit extending from the pump outlet to said filter press, and valves controlling said conduits.

2. The combination with a tank of a centrifugal pump having its inlet connected to said tank, the shaft of said pump extendinginto the tank and being provlded with means for agitating the contents thereof.

3. The combination with a tank of a centrifugal pump having its inlet connected to said tank, the shaft of said pump extending into the tank and being provided with means for a gitatin the contents thereof comprisin g helical bdades.

4:- The combination with a tank, a rotary pump having its inlet connected to said tank near one end thereof, a conduit extending from the pump outlet to another portion of the tank, overflow connections, and a feed water pipe connected to the tank near the pump inlet.

5. The combination with a tank having a tapering extension at one end near the bottom, of a rotary pump having its inlet connected to said extension, the shaft of said pump extending into said extension and be ing provided with means for agitating the contents thereof,

6. The combination with a tank of a centrifugal pump having its-inlet connected to said tank, the shaft of said pump extending into the tank and being provided with means for agitatin the contents thereof, and a conduit extending from the pump outlet and opening into the tank near the other end thereof.

WILLIAM F. TRAUDT. Witnesses A. PARKER-SMITH, M. G. CRAWFORD. 

